Sand-compressing means for making molds.



W. C. LANG.

SAND COMPRESSING MEANS FOR MAKING MOLDS.

APPLICATiON FILED APR. 20 I914- 1 13x638 A Patented Apr. 27 1915.

.. A, i, e

THE NORRIS PETERS CO., PHOTO-IJTHQ, WASHINGTON. D. l

' era rrrn WILLIAM C. LANG, OF CLEVELAND, OHIO.

Specification of Letters Patent.

Patented Apr, 27, 1915.

Application filed April 20, 1914. Serial No. 833,097.

To all whom it may concern:

Be it known that 1, WILLIAM C. LANG, a citizen of the United States of America, residing at Cleveland, in the county of Guyahoga and State of Ohio, have invented certain new and useful Improvements in Sand- Compressing Means for Making Molds; and I hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it pertains to make and use the same.

This invention relates to improvements in sand-compressing means for making molds, and pertains more especially to means whereby during the simultaneous compression of the body of molding sand supplied to each of the vertical compartments into which the upper flask-section of a mold is divided and the body of'sand supplied to the lower flask-section of said mold against opposite faces respectively of a double-faced pattern-plate the extent of compression of the sand-body in each of the aforesaid compartments shall be substantially equal to the extent of compression of the sand-body in the lower flask-section.

The primary object of this invention is therefore to attain equality in the compression of said sand-bodies in compressing the molding sand supplied to said flask-sections during a relative readjustment of a moldbottom embraced by the lower end of the lower flask-section, the pattern-plate interposed between the two flask-sections, and the means employed in exerting pressure on the molding sand in the compartments of the upper flask-section.

Another object is to reduce to a minimum the friction between each upright wall of each sand-receiving compartment of the upper flask-section and the means employed in covering and compressing the body of molding sand supplied to said compartment.

WVith these objects in view, this invention consists in certain features of construction, and combinations and relative arrangement of parts, hereinafter described, pointed out in the claims, and illustrated in the accompanying drawings.

In said drawings, Figure 1 is a vertical section showing a double-faced patternplate interposed between the upper flasksection and the lower flask-section and illustrating the depressibility of said flask-sections and the pattern-plate independently of the mold-bottom and also illustrating the application of improved means for compressing the sand supplied to the compartments of the upper flask-section. Fig. 2 is a horizontal section on line 2-2, Fig. 1. Fig. 3 is a vertical section on line 33, Fig. 1.

lteferring to said drawings, A indicates the vertically arranged lower flask-section which is shown supplied with a body of molding sand at, and a horizontally arranged mold-bottom B forms the base for the sand-body a and extends into the lower end of said flask-section to render said flasksection depressible independently of said mold-bottom, but I would here remark that said sand-body is somewhat cdmpressed upon supplying it to said flask-section to create enough friction between the said sand-body and said flask-section to prevent descent of said flask-section by gravity. The lower flask-section is therefore filled, between the mold-bottom and the patternplate with a somewhat compressed body of molding sand. The mold-bottom B is supported in any approved manner, as, for instance, by a floor or table, the top surface whereof is represented by the horizontal line b.

A double-faced pattern-plate G covers the body of molding sand and rests on the lower flask-section A and lies in a substantially horizontal position.

The mold-bottom B is supported in any approved manner and thick enough to extend downwardly from the sand-body a in the lower flask-section A. far enough below the lower extremity or externally of said flask-section to permit the descent of said flask-section independently of the moldbottom far enough to effect the requisite relative readjustment of the pattern-plate and the mold-bottom to sufliciently reduce the distance between the mold-bottom and the pattern-plate and thereby compress said sand-body the extent required.

D indicates the upper flask-section which is mounted on the pattern-plate C and arranged in line vertically with the lower flask-section A. The upper flask-section is divided internally into substantially corresponding vertically arranged compartments 5 each of which is supplied with a body of molding sand d, and the partition 6 between adjacent compartments is consequently arranged vertically. The patternplate C has its upper face spaced from the bottom edges of the partitions 6 so that in supplying the compartments 5 with molding sand upon mounting the upper flasksection on the pattern-plate molding sand will run to' and cover said edges of the partitions and form an unbroken or continuous layer of sand on the pattern-plate.

Resting upon the body of molding sand within each compartment 5 is a comparatively thin horizontally arranged metal plate 6 which is large enough in dimensions to cover said body of molding sand and consequently extends into close proximity to the upright walls of said compartment. Each plate 6 is carried by a wooden slab E to which said plate is secured preferably removably by screws 7, as shown in Fig. 1. Each slab E is smaller in dimensions horizontally than and arranged centrally relative to the plate 6 carried by the slab. It will be observed therefore that each slab E is narrower and shorter than the connected plate ,6 and has its edges spaced inwardly from the edges of the plate. All the slabs e are tied together by a board G which is arranged at and extends across the upper sides of said slabs and has the slabs secured thereto in any approved manner, and said board is provided at its upper side with cleats 8 arranged parallel with the slabs and suitably attached to and reinforcing said board.

The arrangement of the parts is such that when the plates 6 have entered the compartments 5 from above a suitable distance during the application of the board G upon supplying said compartments with molding sand to a suitable height, the board is spaced from the top edges of the partitions 6, and hence it will be observed that said board and connected plate-bearing slabs are capable of being depressed independently of the upper flask-section. The partitions 6 are of course necessary to support the molding sand compressed within the upper fiask-section upon the completion of the cope formed by said flask-section and compressed sand therein.

It is obvious that a depression of the board G results in the descent of all of the sand-compressing plates 6 and in the simulpattern-plate and the lower flask-section independently of the mold-bottom so that the sand-body in the lower flask-section is com: pressed during the compression of the sand 7 in the upper flask-section.

I would here remark that if the sand-com pressing plates 6 were not employed and in lieu thereof the slabs E were as large in dimensions as said plates and employed as sand-compressing bodies the friction between the edges of the slabs and the upright walls of the compartments in the upper flask-section, owing to the comparatively great thickness of the slabs, would be so great that said slabs would not lower far enough independently of the upper flasksection during the compression of the sandbodies in both flask-sections to have the extent of the compression of the sand within the upper flask-section as great as the compression of the sand-body within the lower flask-section. By my improved construction and relative arrangement of the parts and employing thin plates as the sand-compressing bodies for the upper flask-section the friction between each of said sand-compressing bodies and said flask-section is reduced to a minimum and friction between each slab and said flask-section is entirely obviated sothat the sand-compressing plates will during the depression of the board Gin compressing the sand in saidfiask-section move far enough independently of said flask-section to effect an adequate compression of the sand-body in each compartment of said flask-section.

What I claim is 1. Sand-compressing means for making and a board extending across the upper sides a of and secured to said slabs, which board is provided at its upper side with reinforcing cleats arranged parallel with the slabs.

2. The combination, with a substantially horizontally arranged pattern-plate, anda flask-section arranged on the pattern-plate and having vertically arranged compartments adapted to receive molding'sand, of plates adapted to cover the molding sand in the different compartments respectively of said flask-section; slabs arranged over and carrying the different plates respectively, each slab being smaller in dimensionshorizontally than the connected plate, and a board arranged above and rigid with said slabs, the relative arrangement of the parts being such that when the plates have entered no I the aforesaid compartments from above a suitable distance upon supplying said compartments with molding sand to a suitable height the board is spaced from the top edge of each partition between adjacent c0mpartments.

3. The combination, with a suitably supported horizontally arranged mold-bottom, the lower flask-section embracing the upper portion of said mold-bottom, a double-faced pattern-plate lying in a substantially horizontal position on said flask-section, and the upper flask-section mounted on the patternplate, the upper flask-section having vertically arranged compartments adapted to be supplied with molding sand, and the lower flask-section being adapted to be filled with molding sand between the mold-bottom and the pattern-plate, of plates adapted to cover Copies of this patent may be obtained for five cents each, by addressing the the molding sand in the diflierent compartments respectively of the upper flask-section; slabs arranged over and carrying the different plates respectively, each slab being smaller in dimensions horizontally than the connected plate, said slabs being tied together, said slabs being depressible independently of the upper flask-section, and said slabs, the upper flask-section the pattern-plate and the lower flask-section being capable of descending together independently of the mold-bottom.

In testimony whereof, I sign the f0regoing specification, in the presence of two witnesses.

WILLIAM C. LANG. Witnesses:

B. 0. BROWN, Vro'ron C. LYNCH.

Commissioner of Patents,

Washington, D. G. 

